WO2012026559A1 - フッ素ゴム成形品 - Google Patents
フッ素ゴム成形品 Download PDFInfo
- Publication number
- WO2012026559A1 WO2012026559A1 PCT/JP2011/069236 JP2011069236W WO2012026559A1 WO 2012026559 A1 WO2012026559 A1 WO 2012026559A1 JP 2011069236 W JP2011069236 W JP 2011069236W WO 2012026559 A1 WO2012026559 A1 WO 2012026559A1
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- WIPO (PCT)
- Prior art keywords
- fluororubber
- mol
- mass
- carbon black
- kpa
- Prior art date
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- 229920001973 fluoroelastomer Polymers 0.000 title claims abstract description 184
- 238000004132 cross linking Methods 0.000 claims abstract description 81
- BQCIDUSAKPWEOX-UHFFFAOYSA-N 1,1-Difluoroethene Chemical compound FC(F)=C BQCIDUSAKPWEOX-UHFFFAOYSA-N 0.000 claims abstract description 60
- 239000000203 mixture Substances 0.000 claims abstract description 53
- 239000006229 carbon black Substances 0.000 claims abstract description 31
- 238000005259 measurement Methods 0.000 claims abstract description 24
- 238000012360 testing method Methods 0.000 claims abstract description 18
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000000178 monomer Substances 0.000 claims description 82
- DOIRQSBPFJWKBE-UHFFFAOYSA-N dibutyl phthalate Chemical compound CCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC DOIRQSBPFJWKBE-UHFFFAOYSA-N 0.000 claims description 66
- 229920001971 elastomer Polymers 0.000 claims description 58
- 239000005060 rubber Substances 0.000 claims description 58
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 31
- 239000003431 cross linking reagent Substances 0.000 claims description 30
- 238000000034 method Methods 0.000 claims description 28
- 229910052757 nitrogen Inorganic materials 0.000 claims description 8
- 238000003860 storage Methods 0.000 claims description 8
- 238000010521 absorption reaction Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 5
- 238000001179 sorption measurement Methods 0.000 claims description 5
- -1 perfluoro Chemical group 0.000 description 37
- 229920000728 polyester Polymers 0.000 description 34
- 230000000704 physical effect Effects 0.000 description 28
- 229910052731 fluorine Inorganic materials 0.000 description 26
- 238000004898 kneading Methods 0.000 description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical group O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 26
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 24
- 239000011737 fluorine Substances 0.000 description 24
- 239000010410 layer Substances 0.000 description 24
- 239000003921 oil Substances 0.000 description 23
- 238000006116 polymerization reaction Methods 0.000 description 23
- 235000019241 carbon black Nutrition 0.000 description 22
- 239000007864 aqueous solution Substances 0.000 description 21
- 229910001873 dinitrogen Inorganic materials 0.000 description 21
- 239000003566 sealing material Substances 0.000 description 20
- 238000012856 packing Methods 0.000 description 19
- HCDGVLDPFQMKDK-UHFFFAOYSA-N hexafluoropropylene Chemical group FC(F)=C(F)C(F)(F)F HCDGVLDPFQMKDK-UHFFFAOYSA-N 0.000 description 17
- 150000001875 compounds Chemical class 0.000 description 16
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- 239000000446 fuel Substances 0.000 description 15
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- 239000011347 resin Substances 0.000 description 15
- BLTXWCKMNMYXEA-UHFFFAOYSA-N 1,1,2-trifluoro-2-(trifluoromethoxy)ethene Chemical compound FC(F)=C(F)OC(F)(F)F BLTXWCKMNMYXEA-UHFFFAOYSA-N 0.000 description 14
- 229910052740 iodine Inorganic materials 0.000 description 13
- 150000002978 peroxides Chemical class 0.000 description 13
- 229920005862 polyol Polymers 0.000 description 13
- 150000003077 polyols Chemical class 0.000 description 13
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 12
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- 125000004432 carbon atom Chemical group C* 0.000 description 12
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- 238000002156 mixing Methods 0.000 description 11
- RHQDFWAXVIIEBN-UHFFFAOYSA-N Trifluoroethanol Chemical group OCC(F)(F)F RHQDFWAXVIIEBN-UHFFFAOYSA-N 0.000 description 10
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 10
- 229910052751 metal Inorganic materials 0.000 description 10
- 239000002184 metal Substances 0.000 description 10
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical group [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 9
- 208000028659 discharge Diseases 0.000 description 9
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 9
- 229920000768 polyamine Polymers 0.000 description 9
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- KOMNUTZXSVSERR-UHFFFAOYSA-N 1,3,5-tris(prop-2-enyl)-1,3,5-triazinane-2,4,6-trione Chemical compound C=CCN1C(=O)N(CC=C)C(=O)N(CC=C)C1=O KOMNUTZXSVSERR-UHFFFAOYSA-N 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 8
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- 239000011630 iodine Substances 0.000 description 8
- 239000007788 liquid Substances 0.000 description 8
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 7
- 241000196324 Embryophyta Species 0.000 description 7
- 238000005481 NMR spectroscopy Methods 0.000 description 7
- OWCNWICUDXNCTI-UHFFFAOYSA-N azanium;2,2,3,3,4,4,5,5,6,6,6-undecafluorohexanoate Chemical compound N.OC(=O)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F OWCNWICUDXNCTI-UHFFFAOYSA-N 0.000 description 7
- 235000013305 food Nutrition 0.000 description 7
- 239000003505 polymerization initiator Substances 0.000 description 7
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- 239000010935 stainless steel Substances 0.000 description 7
- 238000003756 stirring Methods 0.000 description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 6
- 239000004734 Polyphenylene sulfide Substances 0.000 description 6
- 239000004372 Polyvinyl alcohol Substances 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 6
- 229910052794 bromium Inorganic materials 0.000 description 6
- 230000006835 compression Effects 0.000 description 6
- 238000007906 compression Methods 0.000 description 6
- 238000003851 corona treatment Methods 0.000 description 6
- 229920005558 epichlorohydrin rubber Polymers 0.000 description 6
- 125000001153 fluoro group Chemical group F* 0.000 description 6
- 229920006122 polyamide resin Polymers 0.000 description 6
- 229920000069 polyphenylene sulfide Polymers 0.000 description 6
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- 230000002787 reinforcement Effects 0.000 description 6
- 229910052708 sodium Inorganic materials 0.000 description 6
- 239000011734 sodium Substances 0.000 description 6
- 125000002947 alkylene group Chemical group 0.000 description 5
- 150000004714 phosphonium salts Chemical class 0.000 description 5
- 230000003014 reinforcing effect Effects 0.000 description 5
- 239000004065 semiconductor Substances 0.000 description 5
- 239000011787 zinc oxide Substances 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000006057 Non-nutritive feed additive Substances 0.000 description 4
- REYJJPSVUYRZGE-UHFFFAOYSA-N Octadecylamine Chemical compound CCCCCCCCCCCCCCCCCCN REYJJPSVUYRZGE-UHFFFAOYSA-N 0.000 description 4
- 229920000800 acrylic rubber Polymers 0.000 description 4
- 125000000217 alkyl group Chemical group 0.000 description 4
- 150000001491 aromatic compounds Chemical class 0.000 description 4
- USFRYJRPHFMVBZ-UHFFFAOYSA-M benzyl(triphenyl)phosphanium;chloride Chemical compound [Cl-].C=1C=CC=CC=1[P+](C=1C=CC=CC=1)(C=1C=CC=CC=1)CC1=CC=CC=C1 USFRYJRPHFMVBZ-UHFFFAOYSA-M 0.000 description 4
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 4
- ZFVMWEVVKGLCIJ-UHFFFAOYSA-N bisphenol AF Chemical compound C1=CC(O)=CC=C1C(C(F)(F)F)(C(F)(F)F)C1=CC=C(O)C=C1 ZFVMWEVVKGLCIJ-UHFFFAOYSA-N 0.000 description 4
- UUAGAQFQZIEFAH-UHFFFAOYSA-N chlorotrifluoroethylene Chemical group FC(F)=C(F)Cl UUAGAQFQZIEFAH-UHFFFAOYSA-N 0.000 description 4
- 238000013329 compounding Methods 0.000 description 4
- 238000007796 conventional method Methods 0.000 description 4
- 235000014113 dietary fatty acids Nutrition 0.000 description 4
- 238000005553 drilling Methods 0.000 description 4
- 239000000194 fatty acid Substances 0.000 description 4
- 229930195729 fatty acid Natural products 0.000 description 4
- 239000004973 liquid crystal related substance Substances 0.000 description 4
- 125000004430 oxygen atom Chemical group O* 0.000 description 4
- 229920000058 polyacrylate Polymers 0.000 description 4
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 4
- KHXKESCWFMPTFT-UHFFFAOYSA-N 1,1,1,2,2,3,3-heptafluoro-3-(1,2,2-trifluoroethenoxy)propane Chemical compound FC(F)=C(F)OC(F)(F)C(F)(F)C(F)(F)F KHXKESCWFMPTFT-UHFFFAOYSA-N 0.000 description 3
- DMWVYCCGCQPJEA-UHFFFAOYSA-N 2,5-bis(tert-butylperoxy)-2,5-dimethylhexane Chemical compound CC(C)(C)OOC(C)(C)CCC(C)(C)OOC(C)(C)C DMWVYCCGCQPJEA-UHFFFAOYSA-N 0.000 description 3
- 229920002943 EPDM rubber Polymers 0.000 description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 150000001412 amines Chemical class 0.000 description 3
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 3
- 239000000920 calcium hydroxide Substances 0.000 description 3
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- GDVKFRBCXAPAQJ-UHFFFAOYSA-A dialuminum;hexamagnesium;carbonate;hexadecahydroxide Chemical compound [OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Al+3].[Al+3].[O-]C([O-])=O GDVKFRBCXAPAQJ-UHFFFAOYSA-A 0.000 description 3
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 239000000945 filler Substances 0.000 description 3
- XUCNUKMRBVNAPB-UHFFFAOYSA-N fluoroethene Chemical group FC=C XUCNUKMRBVNAPB-UHFFFAOYSA-N 0.000 description 3
- 239000011888 foil Substances 0.000 description 3
- 229960001545 hydrotalcite Drugs 0.000 description 3
- 229910001701 hydrotalcite Inorganic materials 0.000 description 3
- RAXXELZNTBOGNW-UHFFFAOYSA-N imidazole Natural products C1=CNC=N1 RAXXELZNTBOGNW-UHFFFAOYSA-N 0.000 description 3
- 239000000314 lubricant Substances 0.000 description 3
- 239000000395 magnesium oxide Substances 0.000 description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 3
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 3
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- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 description 2
- WUMVZXWBOFOYAW-UHFFFAOYSA-N 1,2,3,3,4,4,4-heptafluoro-1-(1,2,3,3,4,4,4-heptafluorobut-1-enoxy)but-1-ene Chemical compound FC(F)(F)C(F)(F)C(F)=C(F)OC(F)=C(F)C(F)(F)C(F)(F)F WUMVZXWBOFOYAW-UHFFFAOYSA-N 0.000 description 2
- UGJCILYXGIEERK-UHFFFAOYSA-N 2-tert-butylperoxy-1,3-di(propan-2-yl)benzene Chemical compound CC(C)C1=CC=CC(C(C)C)=C1OOC(C)(C)C UGJCILYXGIEERK-UHFFFAOYSA-N 0.000 description 2
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 description 2
- QMIWYOZFFSLIAK-UHFFFAOYSA-N 3,3,3-trifluoro-2-(trifluoromethyl)prop-1-ene Chemical compound FC(F)(F)C(=C)C(F)(F)F QMIWYOZFFSLIAK-UHFFFAOYSA-N 0.000 description 2
- PDFSXHZXNZCKNF-UHFFFAOYSA-N 3,3,4,4,5,5,6,6,7,7,8,8-dodecafluorodeca-1,9-diene Chemical compound C=CC(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C=C PDFSXHZXNZCKNF-UHFFFAOYSA-N 0.000 description 2
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 description 2
- HTVITOHKHWFJKO-UHFFFAOYSA-N Bisphenol B Chemical compound C=1C=C(O)C=CC=1C(C)(CC)C1=CC=C(O)C=C1 HTVITOHKHWFJKO-UHFFFAOYSA-N 0.000 description 2
- CPELXLSAUQHCOX-UHFFFAOYSA-M Bromide Chemical compound [Br-] CPELXLSAUQHCOX-UHFFFAOYSA-M 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 2
- 239000005977 Ethylene Substances 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 description 2
- 239000006237 Intermediate SAF Substances 0.000 description 2
- 239000005642 Oleic acid Substances 0.000 description 2
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 description 2
- QYKIQEUNHZKYBP-UHFFFAOYSA-N Vinyl ether Chemical class C=COC=C QYKIQEUNHZKYBP-UHFFFAOYSA-N 0.000 description 2
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- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 2
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- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
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- 239000000292 calcium oxide Substances 0.000 description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 239000011203 carbon fibre reinforced carbon Substances 0.000 description 2
- YCIMNLLNPGFGHC-UHFFFAOYSA-N catechol Chemical compound OC1=CC=CC=C1O YCIMNLLNPGFGHC-UHFFFAOYSA-N 0.000 description 2
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- PPQREHKVAOVYBT-UHFFFAOYSA-H dialuminum;tricarbonate Chemical compound [Al+3].[Al+3].[O-]C([O-])=O.[O-]C([O-])=O.[O-]C([O-])=O PPQREHKVAOVYBT-UHFFFAOYSA-H 0.000 description 2
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- POULHZVOKOAJMA-UHFFFAOYSA-N dodecanoic acid Chemical compound CCCCCCCCCCCC(O)=O POULHZVOKOAJMA-UHFFFAOYSA-N 0.000 description 2
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- IPCSVZSSVZVIGE-UHFFFAOYSA-N hexadecanoic acid Chemical compound CCCCCCCCCCCCCCCC(O)=O IPCSVZSSVZVIGE-UHFFFAOYSA-N 0.000 description 2
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- 150000004010 onium ions Chemical class 0.000 description 2
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- KJWHEZXBZQXVSA-UHFFFAOYSA-N tris(prop-2-enyl) phosphite Chemical compound C=CCOP(OCC=C)OCC=C KJWHEZXBZQXVSA-UHFFFAOYSA-N 0.000 description 2
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- ZKFTZRPEWHBVMQ-UHFFFAOYSA-N (1-aminocyclohexyl) N-methylcarbamate Chemical compound CNC(=O)OC1(CCCCC1)N ZKFTZRPEWHBVMQ-UHFFFAOYSA-N 0.000 description 1
- QEQBMZQFDDDTPN-UHFFFAOYSA-N (2-methylpropan-2-yl)oxy benzenecarboperoxoate Chemical compound CC(C)(C)OOOC(=O)C1=CC=CC=C1 QEQBMZQFDDDTPN-UHFFFAOYSA-N 0.000 description 1
- KDGNCLDCOVTOCS-UHFFFAOYSA-N (2-methylpropan-2-yl)oxy propan-2-yl carbonate Chemical compound CC(C)OC(=O)OOC(C)(C)C KDGNCLDCOVTOCS-UHFFFAOYSA-N 0.000 description 1
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- 235000019381 petroleum wax Nutrition 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 150000003014 phosphoric acid esters Chemical class 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920003192 poly(bis maleimide) Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000151 polyglycol Polymers 0.000 description 1
- 239000010695 polyglycol Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 239000012744 reinforcing agent Substances 0.000 description 1
- 229960001755 resorcinol Drugs 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229920005573 silicon-containing polymer Polymers 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- RYYKJJJTJZKILX-UHFFFAOYSA-M sodium octadecanoate Chemical compound [Na+].CCCCCCCCCCCCCCCCCC([O-])=O RYYKJJJTJZKILX-UHFFFAOYSA-M 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical compound S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000010557 suspension polymerization reaction Methods 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 239000003760 tallow Substances 0.000 description 1
- PNWOTXLVRDKNJA-UHFFFAOYSA-N tert-butylperoxybenzene Chemical compound CC(C)(C)OOC1=CC=CC=C1 PNWOTXLVRDKNJA-UHFFFAOYSA-N 0.000 description 1
- IBWGNZVCJVLSHB-UHFFFAOYSA-M tetrabutylphosphanium;chloride Chemical compound [Cl-].CCCC[P+](CCCC)(CCCC)CCCC IBWGNZVCJVLSHB-UHFFFAOYSA-M 0.000 description 1
- TXEYQDLBPFQVAA-UHFFFAOYSA-N tetrafluoromethane Chemical compound FC(F)(F)F TXEYQDLBPFQVAA-UHFFFAOYSA-N 0.000 description 1
- 239000006234 thermal black Substances 0.000 description 1
- 229920002725 thermoplastic elastomer Polymers 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 1
- XLAIWHIOIFKLEO-OWOJBTEDSA-N trans-stilbene-4,4'-diol Chemical compound C1=CC(O)=CC=C1\C=C\C1=CC=C(O)C=C1 XLAIWHIOIFKLEO-OWOJBTEDSA-N 0.000 description 1
- KSMYREBPTSSZDR-UHFFFAOYSA-M tributyl(prop-2-enyl)phosphanium;chloride Chemical compound [Cl-].CCCC[P+](CCCC)(CCCC)CC=C KSMYREBPTSSZDR-UHFFFAOYSA-M 0.000 description 1
- GRPURDFRFHUDSP-UHFFFAOYSA-N tris(prop-2-enyl) benzene-1,2,4-tricarboxylate Chemical compound C=CCOC(=O)C1=CC=C(C(=O)OCC=C)C(C(=O)OCC=C)=C1 GRPURDFRFHUDSP-UHFFFAOYSA-N 0.000 description 1
- XHGIFBQQEGRTPB-UHFFFAOYSA-N tris(prop-2-enyl) phosphate Chemical compound C=CCOP(=O)(OCC=C)OCC=C XHGIFBQQEGRTPB-UHFFFAOYSA-N 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000010456 wollastonite Substances 0.000 description 1
- 229910052882 wollastonite Inorganic materials 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 description 1
- 229910052984 zinc sulfide Inorganic materials 0.000 description 1
- DRDVZXDWVBGGMH-UHFFFAOYSA-N zinc;sulfide Chemical compound [S-2].[Zn+2] DRDVZXDWVBGGMH-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/04—Carbon
Definitions
- the present invention relates to a fluororubber molded article having excellent mechanical properties at high temperatures.
- Fluorororubber is known to have excellent chemical resistance, oil resistance, heat resistance, and good compression set resistance at high temperatures, but mechanical properties at high temperatures such as hot strength and hot elongation In recent years, for example, when a fluororubber crosslinked product is used in a high temperature environment exceeding 100 ° C., it is required to have excellent durability not only in heat resistance but also in mechanical properties at high temperature. .
- Patent Document 1 For example, from the viewpoint of improving compression set, a composition as shown in Patent Document 1 has been proposed, but since room temperature elongation is small, it is expected that thermal elongation will be further reduced. Further, Patent Document 2 discloses an improvement in hot elongation, but it is not a physical property that can withstand even in a severer use environment. As an example of improving strength at high temperature, as shown in Patent Document 3, a combination of fluororubber and fluorine-containing thermoplastic elastomer is exemplified, but since room temperature elongation is small, thermal elongation is further reduced. It is expected to be.
- the object of the present invention is to provide a fluororubber molded article that is excellent not only in heat resistance but also in mechanical properties at high temperatures.
- the present invention has a fluororubber crosslinked product obtained by crosslinking a fluororubber composition containing fluororubber (A) and carbon black (B),
- the fluororubber (A) contains 48 to 88 mol% of structural units derived from vinylidene fluoride with respect to 100 mol% of the total amount of structural units derived from all monomer components, and is a structural unit derived from tetrafluoroethylene Is a vinylidene fluoride fluororubber containing 0 to 10 mol%,
- the present invention also includes fluororubber (A) and carbon black (B),
- the fluororubber (A) contains 48 to 88 mol% of structural units derived from vinylidene fluoride with respect to 100 mol% of the total amount of structural units derived from all monomer components, and is a structural unit derived from tetrafluoroethylene Is a vinylidene fluoride fluororubber containing 0 to 10 mol%, In a dynamic viscoelasticity test (measurement frequency: 1 Hz, measurement temperature: 100 ° C.) using a rubber process analyzer (RPA), the shear elastic modulus G ′ (1%) and dynamic strain at a dynamic strain of 1% when uncrosslinked
- the present invention also relates to a fluororubber composition having a difference in shear modulus G ′ (100%) at 100% ⁇ G ′ (G ′ (1%) ⁇ G ′ (100%)) of 120 kPa or more and 3,000 kPa or less.
- the molded article of the present invention has a fluororubber crosslinked product obtained by crosslinking a fluororubber composition containing fluororubber (A) and carbon black (B),
- the fluororubber (A) contains 48 to 88 mol% of structural units derived from vinylidene fluoride with respect to 100 mol% of the total amount of structural units derived from all monomer components, and is a structural unit derived from tetrafluoroethylene Is a vinylidene fluoride fluororubber containing 0 to 10 mol%
- the fluororubber crosslinked product has a dynamic viscoelasticity test (measurement temperature: 160 ° C., tensile strain: 1%, initial load: 157 cN, frequency: 10 Hz)
- the loss elastic modulus E ′′ is 400 kPa or more and 6000 kPa or less.
- Fluorororubber Fluorororubber (A) in the present invention is vinylidene fluoride (VdF) with respect to 100 mol% of the total amount of structural units derived from all monomer components used to form the fluororubber (A).
- VdF-based fluororubber (VdF-based rubber) containing 48 to 88 mol% of structural units (VdF units), and 10 mol when including structural units derived from tetrafluoroethylene (TFE units) % Or less vinylidene fluoride fluororubber (VdF rubber).
- the content of VdF units is preferably 70 to 85 mol%, more preferably 75 to 85 mol%.
- the content of TFE units is preferably 0 to 3 mol%.
- the fluorororubber (A) may contain other structural units other than the VdF unit and the TFE unit.
- the content of other structural units other than VdF units and TFE units is 2 to 52 mol with respect to 100 mol% of the total amount of structural units derived from all monomer components used to form the fluororubber (A). % Is preferred.
- the fluororubber (A) When the fluorororubber (A) has the above composition, it has easy kneading properties, and as described later, it is kneaded with carbon black or the like at a relatively low average shear rate to obtain a fluororubber composition, and desired normal physical properties. Moreover, a fluororubber crosslinked product having mechanical properties at high temperatures can be obtained.
- the VdF rubber is composed of 48 to 88 mol% of structural units derived from VdF, based on 100 mol% of the total amount of structural units derived from all monomer components used to form the fluororubber (A).
- the structural unit derived from fluoroethylene may be 10 mol% or less, and the comonomer is not particularly limited as long as it is copolymerizable with VdF.
- HFP hexafluoropropylene
- PAVE perfluoro (alkyl vinyl ether)
- CTFE chlorotrifluoroethylene
- trifluoroethylene trifluoropropylene, tetrafluoropropylene, pentafluoropropylene, trifluorobutene, tetrafluoroisobutene, hexafluoroisobutene, vinyl fluoride, iodine-containing fluorinated vinyl ether
- CH 2 CFR f
- R f is a linear or branched fluoroalkyl group having 1 to 12 carbon atoms
- a fluorine-containing monomer such as a fluorine-containing monomer (1)
- ethylene (Et) propylene (Pr )
- Fluorine-free monomers such as alkyl vinyl ethers, monomers that give crosslinkable groups (cure sites), and reactive emulsifiers.
- alkyl vinyl ethers monomers that give
- PMVE perfluoro (methyl vinyl ether)
- PPVE perfluoro (propyl vinyl ether)
- CF 2 CFOCF 2 OR f 1 (2)
- R f 1 is a linear or branched perfluoroalkyl group having 1 to 6 carbon atoms, a cyclic perfluoroalkyl group having 5 to 6 carbon atoms, 1 to 3 carbon atoms containing 1 to 3 oxygen atoms, and 6 linear or branched perfluorooxyalkyl groups
- CF 2 CFOCF 2 OCF 3
- CF 2 CFOCF 2 OCF 2 CF 3
- monomer R f is a fluoroalkyl group having a straight chain is preferably a perfluoroalkyl group R f is a linear single A monomer is more preferable.
- R f preferably has 1 to 6 carbon atoms.
- the VdF rubber is preferably a VdF / HFP copolymer, a VdF / copolymer of fluorine-containing monomer (1) represented by the formula (1), or a VdF / PAVE copolymer.
- the VdF / HFP copolymer preferably has a VdF / HFP molar% ratio of 48/52 to 85/15, more preferably 50/50 to 78/22, and 55/45 to 77 / More preferred is 23.
- the molar ratio of VdF / PAVE is preferably 88/12 to 48/52, more preferably 85/15 to 70/30, and particularly preferably 85/15 to 75/25. preferable.
- the molar percentage ratio of VdF / fluorine-containing monomer (1) unit is 88/12 to 48/52.
- the other monomer units other than VdF and the fluorine-containing monomer (1) are preferably those having 0 to 10 mol% of the total monomer units.
- the molar ratio of VdF / fluorinated monomer (1) unit is more preferably 85/15 to 70/30, and particularly preferably 85/15 to 75/25.
- TFE As monomers other than VdF and fluorine-containing monomer (1), TFE, HFP, PMVE, perfluoroethyl vinyl ether (PEVE), PPVE, CTFE, trifluoroethylene, hexafluoroisobutene, vinyl fluoride, Monomers exemplified as the above-mentioned VdF comonomer such as ethylene (Et), propylene (Pr), alkyl vinyl ether, a monomer giving a crosslinkable group, and a reactive emulsifier are preferable, and among them, PMVE, CTFE, More preferred are HFP and TFE (however, the content of TFE is 0 to 10 mol%, preferably 0 to 3 mol%). These monomers and compounds can be used alone or in combination of two or more.
- the fluororubber (A) preferably has a number average molecular weight Mn of 5,000 to 500,000, more preferably 10,000 to 500,000, particularly preferably 20,000 to 500,000.
- the fluorororubber (A) described above can be produced by conventional methods such as emulsion polymerization, suspension polymerization, and solution polymerization.
- a fluororubber having a narrow molecular weight distribution can be produced according to a polymerization method using an iodine (bromine) compound known as iodine (bromine) transfer polymerization.
- fluororubber when it is desired to lower the viscosity of the fluororubber composition, other fluororubber may be blended with the fluororubber (A).
- fluororubbers include low molecular weight liquid fluororubber (number average molecular weight of 1000 or more), low molecular weight fluororubber having a number average molecular weight of about 10,000, and fluororubber having a number average molecular weight of about 100,000 to 200,000.
- the fluororubber is a constitution of a main monomer, and a copolymer obtained by copolymerizing a monomer giving a crosslinkable group can also be suitably used.
- the monomer that gives a crosslinkable group may be any monomer that can introduce an appropriate crosslinkable group depending on the production method and the crosslinking system.
- an iodine atom, a bromine atom, a carbon-carbon double bond, a cyano group examples include known polymerizable compounds containing a carboxyl group, a hydroxyl group, an amino group, an ester group, and a chain transfer agent.
- CY 1 2 CY 2 R f 2 X 1 (3)
- R f 2 may have one or more ether-bonded oxygen atoms, A linear or branched fluorine-containing alkylene group in which some or all of the hydrogen atoms may be substituted with fluorine atoms
- X 1 is an iodine atom or a bromine atom
- Linear or branched fluorine-containing alkylene group that is, a linear or branched fluorine-containing alkylene group in which some or all of the hydrogen atoms are substituted with fluorine atoms, and part or all of the hydrogen atoms are fluorine a linear or branched fluorine-containing oxyalkylene group substituted with atoms or a fluorine-containing polyoxyalkylene group partially or entirely a linear or branched substituted with fluorine atoms of the hydrogen atom,;
- R 1 is Hydrogen atom or methyl group
- CY 4 2 CY 4 (CF 2 ) n -X 1 (5)
- Y 4 is the same or different and is a hydrogen atom or a fluorine atom, and n is an integer of 1 to 8.
- iodine-containing monomer or bromine-containing monomer represented by the formula (4) the general formula (23): (In the formula, m is an integer of 1 to 5, and n is an integer of 0 to 3) Preferred examples include iodine-containing fluorinated vinyl ethers represented by: Among them, ICH 2 CF 2 CF 2 OCF ⁇ CF 2 is preferable among these.
- the iodine-containing monomer or bromine-containing monomer represented by the formula (5) is preferably ICF 2 CF 2 CF ⁇ CH 2 or I (CF 2 CF 2 ) 2 CF ⁇ CH 2 .
- the iodine-containing monomer or bromine-containing monomer represented by the formula (9) is preferably I (CF 2 CF 2 ) 2 OCF ⁇ CF 2 .
- preferred examples of the iodine-containing monomer or bromine-containing monomer represented by the formula (22) include CH 2 ⁇ CHCF 2 CF 2 I and I (CF 2 CF 2 ) 2 CH ⁇ CH 2 .
- “(per) fluoropolyoxyalkylene group” means “fluoropolyoxyalkylene group or perfluoropolyoxyalkylene group”.
- Z is preferably a (per) fluoroalkylene group having 4 to 12 carbon atoms, and R 2 , R 3 , R 4 , R 5 , R 6 and R 7 are preferably hydrogen atoms.
- Z is a (per) fluoropolyoxyalkylene group, - (Q) p -CF 2 O- (CF 2 CF 2 O) m - (CF 2 O) n -CF 2 - (Q) p - (In the formula, Q is an alkylene group having 1 to 10 carbon atoms or an oxyalkylene group having 2 to 10 carbon atoms, p is 0 or 1, and m and n have an m / n ratio of 0.2 to 5.
- the (per) fluoropolyoxyalkylene group is preferably an integer such that the molecular weight of the (per) fluoropolyoxyalkylene group is in the range of 500 to 10,000, preferably 1000 to 4000. .
- Preferred bisolefins are CH 2 ⁇ CH— (CF 2 ) 4 —CH ⁇ CH 2 , CH 2 ⁇ CH— (CF 2 ) 6 —CH ⁇ CH 2 , Formula: CH 2 ⁇ CH—Z 1 —CH ⁇ CH 2 (Wherein Z 1 is —CH 2 OCH 2 —CF 2 O— (CF 2 CF 2 O) m — (CF 2 O) n —CF 2 —CH 2 OCH 2 — (m / n is 0.5)) ) Etc.
- the fluororubber (A) preferably has a Mooney viscosity at 100 ° C. of 20 to 200, more preferably 30 to 180. Mooney viscosity is measured in accordance with ASTM-D1646 and JIS K6300.
- the carbon black (B) is not particularly limited as long as it is a carbon black giving a loss elastic modulus E ′′ in the above range, more preferably a storage elastic modulus E ′ in the range described later.
- Examples of such carbon black include furnace black, acetylene black, thermal black, channel black, and graphite.
- SAF-HS SAF-HS (N 2 SA: 142 m 2 / g, DBP: 130 ml / 100 g), SAF (N 2 SA: 142 m 2 / g, DBP: 115 ml / 100 g), N234 (N 2 SA: 126 m 2 / g, DBP: 125 ml / 100 g), ISAF (N 2 SA: 119 m 2 / g, DBP: 114 ml) / 100 g), ISAF-LS (N 2 SA: 106 m 2 / g, DBP: 75 ml / 100 g), ISAF-HS (N 2 SA: 99 m 2 / g, DBP: 129 ml / 100 g), N339 (N 2 SA: 93 m 2 / g, DBP: 119 ml / 100
- carbon black preferably has a nitrogen adsorption specific surface area (N 2 SA) of 5 to 180 m 2 / g and a dibutyl phthalate (DBP) oil absorption of 40 to 180 ml / 100 g. It is done.
- N 2 SA nitrogen adsorption specific surface area
- DBP dibutyl phthalate
- the nitrogen adsorption specific surface area (N 2 SA) is smaller than 5 m 2 / g, mechanical properties when blended with rubber tend to be reduced. From this viewpoint, the nitrogen adsorption specific surface area (N 2 SA) is 10 m 2. / G or more is preferable, 20 m 2 / g or more is more preferable, and 25 m 2 / g or more is particularly preferable.
- the upper limit is preferably 180 m 2 / g from the viewpoint of easy availability.
- the mechanical properties when blended with rubber tend to decrease.
- 50 ml / 100 g or more, further 60 ml / 100 g or more, particularly 80 ml. / 100g or more is preferable.
- the upper limit is preferably 175 ml / 100 g, more preferably 170 ml / 100 g.
- the blending amount of carbon black (B) is preferably 5 to 65 parts by mass with respect to 100 parts by mass of the fluororubber (A). If the carbon black (B) is too much, the mechanical properties of the cross-linked product tend to be lowered, and if it is too small, the mechanical properties of the cross-linked product tend to be lowered.
- a more preferable blending amount is preferably 6 parts by mass or more, more preferably 10 parts by mass or more with respect to 100 parts by mass of the fluororubber (A) from the viewpoint of good physical property balance, and 55 parts by mass from a point of good physical property balance. Or less, more preferably 50 parts by mass or less, still more preferably 49 parts by mass or less, and particularly preferably 45 parts by mass or less.
- a dynamic strain 1 in a dynamic viscoelasticity test (measurement temperature: 100 ° C., measurement frequency: 1 Hz) with a rubber process analyzer (RPA) as an uncrosslinked rubber is used as a fluororubber composition.
- the difference ⁇ G ′ (G ′ (1%) ⁇ G ′ (100%)) between the shear modulus G ′ (1%) at% and the shear modulus G ′ (100%) at 100% dynamic strain is What is 120 kPa or more and 3,000 kPa or less can be used suitably.
- the difference ⁇ G ′ is used as an index for evaluating the reinforcing property of the rubber composition, and is measured and calculated by a dynamic viscoelasticity test using a rubber process analyzer.
- a fluororubber composition having a difference ⁇ G ′ in the range of 120 kPa to 3,000 kPa is advantageous in terms of normal physical properties and mechanical properties at high temperatures.
- the difference ⁇ G ′ is preferably 150 kPa or more, more preferably 160 kPa or more, from the viewpoint of good normal physical properties and mechanical properties at high temperatures, and the normal physical properties, hardness, viscosity during extrusion molding, and mechanical physical properties at high temperatures. From a favorable point, Preferably it is 2,800 kPa or less, Furthermore, it is 2,500 kPa or less.
- a fluorororubber composition having a difference ⁇ G ′ of 120 kPa or more and 3,000 kPa or less can be prepared using, for example, a kneader or a roll kneader.
- a predetermined amount of fluororubber (A) and carbon black (B), if necessary, an organic amine compound and / or an acid acceptor described later is charged into a closed kneader, and the average shear rate of the rotor is 20 to 1000 ( 1 / second), preferably 50 to 1000 (1 / second), more preferably 100 to 1000 (1 / second), and even more preferably 200 to 1000 (1 / second).
- Examples of the closed kneader include a pressure kneader, a Banbury mixer, a uniaxial kneader, and a biaxial kneader.
- a predetermined amount of fluororubber (A) and carbon black (B) and, if necessary, an organic amine compound and / or acid acceptor described later are charged into a roll kneader, and the average shear rate of the rotor is 20 (1 / second).
- the average shear rate of the rotor is 20 (1 / second).
- the maximum kneading temperature Tm is 80 to 220 ° C. (preferably 120 to 200 ° C.).
- the fluororubber composition obtained by the above methods (1) and (2) does not contain a crosslinking agent (C) or a crosslinking accelerator (D). Moreover, you may perform kneading
- the second and subsequent kneading conditions may be the same as the methods (1) and (2) except that the maximum kneading temperature Tm is 140 ° C. or lower.
- One of the methods for preparing the crosslinkable fluororubber composition used in the present invention is, for example, obtained by the above method (1) or (2), or the above methods (1) and (2). This is a method of further blending and kneading the crosslinking agent (C) and / or the crosslinking accelerator (D) with the fluororubber composition obtained repeatedly.
- the crosslinking agent (C) and the crosslinking accelerator (D) may be blended and kneaded at the same time, or the crosslinking accelerator (D) may be blended and kneaded first, and then the crosslinking agent (C) may be blended and kneaded.
- the kneading conditions for the crosslinking agent (C) and the crosslinking accelerator (D) may be the same as the methods (1) and (2) except that the maximum temperature Tm for kneading is 130 ° C. or less.
- crosslinkable fluororubber composition for example, a roll kneader containing fluorororubber (A) and carbon black (B), crosslinker (C) and / or crosslink accelerator (D) in an appropriate order.
- a predetermined amount is added, and the average shear rate of the rotor is 20 (1 / second) or more, preferably 50 (1 / second) or more, and the kneading is performed at a maximum kneading temperature Tm of 130 ° C. or less.
- a uniform dispersion may be used by previously mixing the fluorororubber (A), the cross-linking agent (C), and the cross-linking accelerator (D).
- the fluororubber (A), polyol-based crosslinking agent and crosslinking accelerator are first kneaded, then carbon black and an organic amine compound described later are blended and kneaded, and the maximum temperature Tm for kneading is 80 to 220 ° C.
- an acid acceptor is blended and kneaded so that the maximum kneading temperature Tm is 130 ° C. or lower.
- the range of the difference ⁇ G ′ is preferably satisfied in the fluororubber composition before blending the crosslinking agent (C) and / or the crosslinking accelerator (D). Moreover, it is preferable that the difference ⁇ G ′ is within the above range even in the fluororubber composition containing the crosslinking agent (C) and / or the crosslinking accelerator (D).
- the average shear rate is preferably 20 (1 / second) or more, and 50 (1 / second) or more. More preferably, by setting the average shear rate to 20 (1 / second) or more, desired normal physical properties and high-temperature mechanical properties can be obtained.
- the cross-linking agent (C) and / or the cross-linking accelerator (D) are specific to the cross-linking system, the type of the fluororubber (A) to be cross-linked (for example, the copolymer composition, the presence / absence or type of cross-linkable group, etc.) It can be appropriately selected according to the purpose of use, usage form, and other kneading conditions.
- crosslinking system for example, a peroxide crosslinking system, a polyol crosslinking system, a polyamine crosslinking system, an oxazole crosslinking system, a thiazole crosslinking system, an imidazole crosslinking system, a triazine crosslinking system, and the like can be employed.
- Peroxide crosslinking system In the case of crosslinking by a peroxide crosslinking system, since it has a carbon-carbon bond at the crosslinking point, a polyol crosslinking system having a carbon-oxygen bond at the crosslinking point and a polyamine crosslinking system having a carbon-nitrogen double bond are used. Compared with it, it is characterized by excellent chemical resistance and steam resistance.
- the peroxide crosslinking agent may be any peroxide that can easily generate a peroxy radical in the presence of heat or a redox system.
- 2,5-dimethyl-2,5-di (t-butylperoxy) hexane or 2,5-dimethyl-2,5-di (t-butylperoxy) -hexyne-3 is preferable.
- crosslinking accelerators for peroxide crosslinking agents particularly organic peroxide crosslinking agents include triallyl cyanurate, triallyl isocyanurate (TAIC), triacryl formal, triallyl trimellitate, N, N '-M-phenylene bismaleimide, dipropargyl terephthalate, diallyl phthalate, tetraallyl terephthalate amide, triallyl phosphate, bismaleimide, fluorinated triallyl isocyanurate (1,3,5-tris (2,3,3-trifluoro -2-propenyl) -1,3,5-triazine-2,4,6-trione), tris (diallylamine) -S-triazine, triallyl phosphite, N, N-diallylacrylamide, 1,6-divinyldodeca Fluorohexane,
- the fluorororubber (A) suitable for the peroxide crosslinking system is preferably a fluororubber containing iodine atoms and / or bromine atoms as crosslinking points.
- the content of iodine atom and / or bromine atom is preferably 0.001 to 10% by mass, more preferably 0.01 to 5% by mass, and particularly preferably 0.1 to 3% by mass from the viewpoint of a good balance of physical properties. .
- the compounding amount of the peroxide crosslinking agent is preferably 0.01 to 10 parts by mass, more preferably 0.1 to 9 parts by mass, particularly preferably 100 parts by mass of the fluororubber (A). 0.2 to 8 parts by mass.
- the peroxide crosslinking agent is less than 0.01 parts by mass, the crosslinking of the fluororubber (A) tends not to proceed sufficiently, and when it exceeds 10 parts by mass, the balance of physical properties tends to decrease.
- the blending amount of the crosslinking accelerator is usually 0.01 to 10 parts by mass, preferably 0.1 to 9 parts by mass with respect to 100 parts by mass of the fluororubber (A).
- the amount of the crosslinking accelerator is less than 0.01 parts by mass, undercuring tends to be caused.
- the amount exceeds 10 parts by mass the crosslinking property tends to be shortened and the physical property balance tends to be lowered.
- Polyol crosslinking system Crosslinking by a polyol crosslinking system is preferable in that it has a carbon-oxygen bond at the crosslinking point, has a small compression set, and is excellent in moldability.
- polyol crosslinking agent a compound conventionally known as a fluororubber crosslinking agent can be used.
- a polyhydroxy compound particularly, a polyhydroxy aromatic compound is preferably used from the viewpoint of excellent heat resistance.
- the polyhydroxy aromatic compound is not particularly limited.
- 2,2-bis (4-hydroxyphenyl) propane hereinafter referred to as bisphenol A
- 2,2-bis (4-hydroxyphenyl) perfluoropropane (Hereinafter referred to as bisphenol AF)
- resorcin 1,3-dihydroxybenzene, 1,7-dihydroxynaphthalene, 2,7-dihydroxynaphthalene, 1,6-dihydroxynaphthalene, 4,4′-dihydroxydiphenyl, 4,4 ′ -Dihydroxystilbene, 2,6-dihydroxyanthracene, hydroquinone, catechol, 2,2-bis (4-hydroxyphenyl) butane (hereinafter referred to as bisphenol B), 4,4-bis (4-hydroxyphenyl) valeric acid, , 2-bis (4-hydroxypheny ) Tetrafluorodichloropropane, 4,4′-dihydroxydiphenyl sulfone, 4,4′-dihydroxydipheny
- a polyhydroxy compound is preferable from the viewpoint of small compression set such as a molded article to be obtained and excellent moldability, a polyhydroxy aromatic compound is more preferable because of excellent heat resistance, and bisphenol AF is preferable. Further preferred.
- the crosslinking reaction can be promoted by promoting the formation of intramolecular double bonds in the dehydrofluorination reaction of the fluororubber main chain and the addition of polyhydroxy compounds to the generated double bonds. it can.
- An onium compound is generally used as a crosslinking accelerator for polyol crosslinking.
- the onium compound is not particularly limited, and examples thereof include ammonium compounds such as quaternary ammonium salts, phosphonium compounds such as quaternary phosphonium salts, oxonium compounds, sulfonium compounds, cyclic amines, and monofunctional amine compounds. Of these, quaternary ammonium salts and quaternary phosphonium salts are preferred.
- the quaternary ammonium salt is not particularly limited.
- the quaternary phosphonium salt is not particularly limited.
- tetrabutylphosphonium chloride benzyltriphenylphosphonium chloride (hereinafter referred to as BTPPC), benzyltrimethylphosphonium chloride, benzyltributylphosphonium chloride, tributylallylphosphonium chloride, tributyl.
- BTPPC benzyltriphenylphosphonium chloride
- BTPPC benzyltriphenylphosphonium chloride
- BTPPC benzyltriphenylphosphonium chloride
- crosslinking accelerator a quaternary ammonium salt, a solid solution of a quaternary phosphonium salt and bisphenol AF, or a chlorine-free crosslinking accelerator disclosed in JP-A-11-147891 can be used.
- the blending amount of the polyol crosslinking agent is preferably 0.01 to 10 parts by mass, more preferably 0.1 to 7 parts by mass with respect to 100 parts by mass of the fluororubber (A).
- the polyol crosslinking agent is less than 0.01 part by mass, the crosslinking of the fluororubber (A) tends not to proceed sufficiently, and when it exceeds 10 parts by mass, the balance of physical properties tends to be lowered.
- the blending amount of the crosslinking accelerator is preferably 0.01 to 8 parts by mass, more preferably 0.02 to 5 parts by mass with respect to 100 parts by mass of the fluororubber (A).
- the crosslinking accelerator is less than 0.01 parts by mass, the crosslinking of the fluororubber (A) tends not to proceed sufficiently, and when it exceeds 8 parts by mass, the balance of physical properties tends to decrease.
- Polyamine crosslinking system When crosslinked by polyamine crosslinking, it has a carbon-nitrogen double bond at the crosslinking point and is characterized by excellent dynamic mechanical properties. However, the compression set tends to be larger than when crosslinking is performed using a polyol crosslinking system or a peroxide crosslinking system.
- polyamine-based crosslinking agent examples include polyamine compounds such as hexamethylenediamine carbamate, N, N′-dicinnamylidene-1,6-hexamethylenediamine, and 4,4′-bis (aminocyclohexyl) methanecarbamate. Among these, N, N′-dicinnamylidene-1,6-hexamethylenediamine is preferable.
- the compounding amount of the polyamine-based crosslinking agent is preferably 0.01 to 10 parts by mass, more preferably 0.2 to 7 parts by mass with respect to 100 parts by mass of the fluororubber (A).
- the polyamine crosslinking agent is less than 0.01 parts by mass, the crosslinking of the fluororubber (A) tends not to proceed sufficiently.
- the polyamine crosslinking agent exceeds 10 parts by mass, the balance of physical properties tends to decrease.
- a peroxide crosslinking system or a polyol crosslinking system is preferable as the crosslinking system, and it is preferable to use a crosslinking agent (C) suitable for each crosslinking system.
- a crosslinking agent (C) suitable for each crosslinking system.
- an ordinary rubber compound for example, a filler, a processing aid, a plasticizer, a colorant, a tackifier, an adhesion aid, an acid acceptor, a pigment, a flame retardant, is used as necessary.
- metal oxides such as calcium oxide, titanium oxide, aluminum oxide, magnesium oxide
- metal hydroxides such as magnesium hydroxide, aluminum hydroxide, calcium hydroxide
- magnesium carbonate, aluminum carbonate, calcium carbonate, carbonic acid Carbonates such as barium
- silicates such as magnesium silicate, calcium silicate, sodium silicate, and aluminum silicate
- sulfates such as aluminum sulfate, calcium sulfate, and barium sulfate
- synthetic hydrotalcite molybdenum disulfide, sulfide
- Metal sulfides such as iron and copper sulfide; diatomaceous earth, asbestos, lithopone (zinc sulfide / barium sulfide), graphite, carbon fluoride, calcium fluoride, coke, quartz fine powder, talc, mica powder, wollastonite, Carbon fiber, aramid fiber, various Isuka, glass fibers, organic reinforcing agents, organic fillers, polytetrafluoro
- Examples of the acid acceptor include calcium oxide, magnesium oxide, lead oxide, zinc oxide, magnesium hydroxide, calcium hydroxide, aluminum hydroxide, and hydrotalcite. These may be used alone or in combination of two or more. May be. In these kneading methods, these may be added in any step, but may be added when the fluororubber (A) and the carbon black (B) are kneaded with a closed kneader or a roll kneader. preferable.
- higher fatty acids such as stearic acid, oleic acid, palmitic acid and lauric acid; higher fatty acid salts such as sodium stearate and zinc stearate; higher fatty acid amides such as stearic acid amide and oleic acid amide; oleic acid Higher fatty acid esters such as ethyl; Petroleum waxes such as carnauba wax and ceresin wax; Polyglycols such as ethylene glycol, glycerin and diethylene glycol; Aliphatic hydrocarbons such as petrolatum and paraffin; Silicone oils, silicone polymers, low molecular weight polyethylene Phthalic acid esters, phosphoric acid esters, rosin, (halogenated) dialkylamines, surfactants, sulfone compounds, fluorine-based auxiliaries, organic amine compounds, and the like.
- higher fatty acids such as stearic acid, oleic acid, palmitic acid and lauric acid
- the organic amine compound and the acid acceptor are preferably blended from the viewpoint that the reinforcing property is improved by coexisting the fluororubber (A) and the carbon black (B) in a closed kneader or a roll kneader. It is an agent.
- the kneading is preferably performed so that the maximum temperature Tm is 80 ° C. to 220 ° C.
- Preferred examples of the organic amine compound include a primary amine represented by R 1 NH 2 , a secondary amine represented by R 1 R 2 NH, and a tertiary amine represented by R 1 R 2 R 3 N.
- R 1 , R 2 and R 3 are the same or different, and all are preferably an alkyl group having 1 to 50 carbon atoms, and the alkyl group may contain a benzene ring as a functional group, a double bond, a conjugated double Bonds may be included.
- the alkyl group may be linear or branched.
- Examples of primary amines include coconut amine, octylamine, laurylamine, stearylamine, oleylamine, beef tallow amine, 17-phenyl-heptadecylamine, octadec-7,11-dienylamine, octadec-7,9-dienylamine, octadec- 9-enylamine, 7-methyl-octadec-7-enylamine and the like.
- Examples of the secondary amine include distearylamine, and examples of the tertiary amine include dimethyloctylamine, dimethyldecylamine, dimethyllaurylamine, Examples include dimethyl myristyl amine, dimethyl palmityl amine, dimethyl stearyl amine, and dimethyl behenyl amine. Of these, amines having about 20 carbon atoms, particularly primary amines, are preferred from the standpoint of easy availability and reinforcement.
- the compounding amount of the organic amine compound is preferably 0.01 to 5 parts by mass with respect to 100 parts by mass of the fluororubber (A).
- a more preferable blending amount is 0.1 parts by mass or more with respect to 100 parts by mass of the fluororubber (A) from the viewpoint of reinforcement, and 4 parts by mass or less from the viewpoint of reinforcement and ease of kneading. .
- metal hydroxides such as calcium hydroxide
- metal oxides such as magnesium oxide and zinc oxide, and hydrotalcite are preferable from the viewpoint of reinforcement, and particularly zinc oxide. Is preferred.
- the compounding amount of the acid acceptor is preferably 0.01 to 10 parts by mass with respect to 100 parts by mass of the fluororubber (A). If the acid acceptor is too much, the physical properties tend to be lowered, and if it is too little, the reinforcing property tends to be lowered.
- a more preferable blending amount is 0.1 parts by mass or more with respect to 100 parts by mass of the fluororubber (A) from the viewpoint of reinforcement, and is preferably 8 parts by mass or less from the viewpoint of physical properties and ease of kneading. 5 parts by mass or less is more preferable.
- the cross-linking method of the fluororubber composition may be selected as appropriate.
- a normal cross-linking method such as a molding method such as extrusion molding or steaming molding or a cross-linking method using a cross-linking can is employed. If secondary crosslinking is required depending on the purpose of use of the crosslinked product, oven crosslinking may be further performed.
- the obtained cross-linked fluororubber also has a dynamic viscoelasticity test (measurement mode: tensile, distance between chucks: 20 mm, tensile strain: 1%, measurement frequency: 10 Hz, initial load: 157 cN, measurement temperature: 160 ° C.)
- the loss elastic modulus E ′′ is 400 kPa or more and 6000 kPa or less, the normal physical properties and the mechanical properties at high temperatures are particularly excellent.
- the lower limit is preferably 420 kPa, more preferably 430 kPa, and the upper limit is preferably 5900 kPa, more preferably 5800 kPa.
- the obtained fluororubber crosslinked product has a dynamic viscoelasticity test (measurement mode: tension, distance between chucks: 20 mm, measurement temperature: 160 ° C., tensile strain: 1%, initial load: 157 cN, frequency: 10 Hz).
- the storage elastic modulus E ′ is more preferably 1500 kPa or more and 20000 kPa or less from the viewpoint of improvement in mechanical properties at high temperatures.
- the lower limit is preferably 1600 kPa, more preferably 1800 kPa, and the upper limit is preferably 19000 kPa, more preferably 18000 kPa.
- the crosslinked fluororubber has a tensile elongation at break of 100 to 700%, further 110% or more, particularly 120% or more, and 680% or less, particularly 650% or less at 160 ° C. This is preferable because it is suitable for use in an environment.
- the cross-linked fluororubber has a tensile breaking strength at 160 ° C. of 1 MPa or more, more preferably 1.5 MPa or more, particularly 2 MPa or more, and 30 MPa or less, particularly 28 MPa or less. This is preferable because it is suitable for use.
- the tensile strength at break and tensile elongation at break are measured using a No. 6 dumbbell according to JIS-K6251.
- the cross-linked fluororubber has a tear strength at 160 ° C. of 3 to 30 kN / m, further 4 kN / m or more, particularly 5 kN / m or more, 29 kN / m or less, particularly 28 kN / m or less. Is preferable because it is suitable for use in a high-temperature environment.
- the cross-linked fluororubber has a tensile elongation at break of 100 to 700%, further 110% or more, particularly 120% or more, and 680% or less, particularly 650% or less at 200 ° C. This is preferable because it is suitable for use in an environment.
- the cross-linked fluororubber has a tensile strength at 200 ° C. of 1 to 30 MPa, more preferably 1.5 MPa or more, particularly 2 MPa or more, and 29 MPa or less, particularly 28 MPa or less. It is preferable because it is suitable for use in the above.
- the cross-linked fluororubber has a tear strength at 200 ° C. of 3 to 30 kN / m, further 4 kN / m or more, particularly 5 kN / m or more, 29 kN / m or less, particularly 28 kN / m or less. Is preferable because it is suitable for use in a high-temperature environment.
- the cross-linked fluororubber of the present invention can be used for various applications, and in particular, for example, can be suitably used for the following various applications.
- Hose As the hose, a hose having a single-layer structure composed only of a cross-linked fluororubber obtained by cross-linking the fluororubber composition of the present invention may be used, or a multi-layer hose having a laminated structure with other layers It may be.
- Examples of the single-layered hose include an exhaust gas hose, an EGR hose, a turbocharger hose, a fuel hose, a brake hose, and an oil hose.
- Examples of the multi-layered hose include an exhaust gas hose, an EGR hose, a turbocharger hose, a fuel hose, a brake hose, and an oil hose.
- a turbo system is often installed in a diesel engine. By sending exhaust gas from the engine to the turbine and rotating it, the compressor connected to the turbine is moved to increase the compression ratio of the air supplied to the engine and improve the output. It is.
- This turbo system that uses the exhaust gas of the engine and obtains a high output leads to a reduction in the size of the engine, a reduction in fuel consumption of the automobile, and a cleaner exhaust gas.
- the turbocharger hose is used in the turbo system as a hose for sending compressed air to the engine.
- a rubber hose with excellent flexibility and flexibility is advantageous, and typically rubber with excellent heat aging resistance and oil resistance (especially fluororubber) )
- a hose having a multilayer structure in which the layer is an inner layer and silicone rubber or acrylic rubber is an outer layer is employed.
- the engine surroundings such as the engine room are exposed to high temperatures and are in a harsh environment where vibration is also applied, and not only heat aging resistance but also excellent mechanical properties at high temperatures are required.
- the hose satisfies these required characteristics at a high level by using a cross-linked fluororubber layer obtained by cross-linking the fluororubber composition of the present invention as a single layer and a multi-layer rubber layer.
- a turbocharger hose having characteristics can be provided.
- examples of the layer made of other materials include a layer made of other rubber, a layer made of a thermoplastic resin, various fiber reinforcing layers, a metal foil layer, and the like.
- acrylonitrile-butadiene rubber or its hydrogenated rubber blend rubber of acrylonitrile-butadiene rubber and polyvinyl chloride, fluorine rubber, epichlorohydrin rubber
- a rubber comprising at least one selected from the group consisting of EPDM and acrylic rubber is preferred, and acrylonitrile-butadiene rubber or hydrogenated rubber thereof, blend rubber of acrylonitrile-butadiene rubber and polyvinyl chloride, fluorine rubber, epichlorohydrin rubber More preferably, it is made of at least one rubber selected from the group consisting of:
- the thermoplastic resin is a heat composed of at least one selected from the group consisting of fluororesins, polyamide resins, polyolefin resins, polyester resins, polyvinyl alcohol resins, polyvinyl chloride resins, and polyphenylene sulfide resins.
- a plastic resin is preferable, and a thermoplastic resin made of at least one selected from the group consisting of a fluororesin, a polyamide resin, a polyvinyl alcohol resin, and a polyphenylene sulfide resin is more preferable.
- surface treatment may be performed as necessary.
- the type of the surface treatment is not particularly limited as long as it is a treatment method that enables adhesion.
- discharge treatment such as plasma discharge treatment or corona discharge treatment, wet metal sodium / naphthalene liquid treatment Etc.
- a primer treatment is also suitable as the surface treatment.
- Primer treatment can be performed according to a conventional method. When the primer treatment is applied, the surface of the fluororubber that has not been surface-treated can be treated, but if the primer treatment is further performed after plasma discharge treatment, corona discharge treatment, metal sodium / naphthalene liquid treatment, etc. are performed in advance. Is more effective.
- the hose using the crosslinked product of the present invention can be suitably used in the following fields.
- hoses such as an apparatus, an oxidation diffusion apparatus, a sputtering apparatus, an ashing apparatus, a cleaning apparatus, an ion implantation apparatus, and an exhaust apparatus.
- the automotive field it can be used as a peripheral device for engines and automatic transmissions, and can be used as a turbocharger hose, EGR hose, exhaust gas hose, fuel hose, oil hose, brake hose, and the like.
- sealing material can be suitably used in the following fields.
- engine body main motion system, valve system, lubricant / cooling system, fuel system, intake / exhaust system; drive system transmission system; chassis steering system; brake system; Gaskets that require heat resistance, oil resistance, fuel oil resistance, engine cooling antifreeze resistance, steam resistance, non-contact type and contact type packing (self-sealing packing) , Piston rings, split ring packings, mechanical seals, oil seals, etc.).
- the sealing material used for the engine body of the automobile engine is not particularly limited.
- a sealing material such as a cylinder head gasket, a cylinder head cover gasket, an oil pan packing, a general gasket, an O-ring, a packing, a timing belt cover gasket, etc. Is mentioned.
- the seal material used in the main motion system of the automobile engine is not particularly limited, and examples thereof include a shaft seal such as a crankshaft seal and a camshaft seal.
- the seal material used in the valve system of an automobile engine is not particularly limited, and examples thereof include a valve stem oil seal for an engine valve and a valve seat for a butterfly valve.
- the sealant used in the lubricant / cooling system for automobile engines is not particularly limited, and examples thereof include engine oil cooler seal gaskets.
- the sealing material used in the engine fuel system for automobiles is not particularly limited.
- fuel injection such as an oil seal of a fuel pump, a filler seal of a fuel tank, a tank packing, a connector O link of a fuel tube, etc.
- EGR sealing materials such as an injector cushion ring, an injector seal ring, an injector O-ring, and a carburetor flange gasket.
- the sealing material used for the intake / exhaust system of the automobile engine is not particularly limited.
- the intake manifold packing of the manifold, the exhaust manifold packing, the throttle body packing of the throttle, the turbine shaft seal of the turbo charge, etc. is not particularly limited.
- the intake manifold packing of the manifold, the exhaust manifold packing, the throttle body packing of the throttle, the turbine shaft seal of the turbo charge, etc. is mentioned.
- the seal material used in the transmission system for automobiles is not particularly limited, and examples thereof include bearing seals, oil seals, O-rings and packings for transmissions, and O-rings and packings for automatic transmissions. It is done.
- the sealing material used in the brake system for automobiles is not particularly limited.
- oil seals, O-rings, packing, etc. master cylinder piston cups (rubber cups), caliper seals, boots, etc. Is mentioned.
- the sealing material used for the electrical equipment for automobiles is not particularly limited, and examples thereof include an O-ring and packing of a car air conditioner.
- the sealing material it is particularly suitable for a sensor sealing material (bush), and further suitable for an oxygen sensor sealing material, a nitrogen oxide sensor sealing material, a sulfur oxide sensor sealing material, and the like.
- the O-ring may be a square ring.
- Applications other than the automotive field are not particularly limited, and include aircraft field, rocket field, ship field, oil field drilling field (for example, packer seals, MWD seals, LWD seals, etc.), chemicals such as plants, pharmaceuticals, etc.
- oil-resistant, chemical-resistant, heat-resistant, steam- or weather-resistant packings, O-rings, and other sealing materials in transportation such as ships and aircraft; similar packing, O-rings, sealing materials in oilfield drilling; Packing, O-rings, sealing materials for food plants, and similar packings, O-rings, sealing materials for food plant equipment (including household products); similar packings, O-rings, sealing materials for nuclear plant equipment; The same packing, O-ring, sealing material and the like can be mentioned.
- belt material for power transmission belts (including flat belts, V-belts, V-ribbed belts, toothed belts, etc.) and conveyor belts (conveyor belts).
- semiconductor manufacturing related fields such as semiconductor manufacturing equipment, liquid crystal panel manufacturing equipment, plasma panel manufacturing equipment, plasma addressed liquid crystal panels, field emission display panels, solar cell substrates, CVD equipment, dry etching equipment exposed to high temperature environments, It can be used for belt materials such as a wet etching apparatus, an oxidation diffusion apparatus, a sputtering apparatus, an ashing apparatus, a cleaning apparatus, an ion implantation apparatus, and an exhaust apparatus.
- Examples of the flat belt include flat belts used for various high temperature parts such as around an engine of an agricultural machine, a machine tool, an industrial machine, and the like.
- conveyor belts for example, conveyor belts for conveying loose and granular materials such as coal, crushed stone, earth and sand, ore, and wood chips in a high temperature environment
- conveyor belts used in steelworks such as blast furnaces
- precision Examples include conveyor belts in applications exposed to high-temperature environments in equipment assembly factories, food factories, and the like.
- Examples of the V belt and V ribbed belt include agricultural machinery, general equipment (OA equipment, printing machines, commercial dryers, etc.), automobile V belts, and V ribbed belts.
- the toothed belt examples include a toothed belt such as a power transmission belt of a transfer robot, a food machine, and a power transmission belt of a machine tool. Can be mentioned. In particular, a timing belt is mentioned as a toothed belt for automobiles.
- examples of the layer made of another material include a layer made of other rubber, a layer made of a thermoplastic resin, various fiber reinforcement layers, a canvas, and a metal foil layer.
- acrylonitrile-butadiene rubber or its hydrogenated rubber blend rubber of acrylonitrile-butadiene rubber and polyvinyl chloride, fluorine rubber, epichlorohydrin rubber
- a rubber comprising at least one selected from the group consisting of EPDM and acrylic rubber is preferred, and acrylonitrile-butadiene rubber or hydrogenated rubber thereof, blend rubber of acrylonitrile-butadiene rubber and polyvinyl chloride, fluorine rubber, epichlorohydrin rubber More preferably, it is made of at least one rubber selected from the group consisting of:
- the thermoplastic resin is a heat composed of at least one selected from the group consisting of fluororesins, polyamide resins, polyolefin resins, polyester resins, polyvinyl alcohol resins, polyvinyl chloride resins, and polyphenylene sulfide resins.
- a plastic resin is preferable, and a thermoplastic resin made of at least one selected from the group consisting of a fluororesin, a polyamide resin, a polyvinyl alcohol resin, and a polyphenylene sulfide resin is more preferable.
- surface treatment may be performed as necessary.
- the type of the surface treatment is not particularly limited as long as it is a treatment method that enables adhesion.
- discharge treatment such as plasma discharge treatment or corona discharge treatment, wet metal sodium / naphthalene liquid treatment Etc.
- a primer treatment is also suitable as the surface treatment.
- Primer treatment can be performed according to a conventional method. When the primer treatment is applied, the surface of the fluororubber that has not been surface-treated can be treated, but if the primer treatment is further performed after plasma discharge treatment, corona discharge treatment, metal sodium / naphthalene liquid treatment, etc. are performed in advance. Is more effective.
- the fluorororubber molded product of the present invention satisfies the required characteristics for anti-vibration rubber at a high level by using it as a rubber layer of a single layer and a multilayer structure in anti-vibration rubber, and is excellent.
- An anti-vibration rubber for automobiles having characteristics can be provided.
- examples of the layer made of other materials include a layer made of other rubber, a layer made of thermoplastic resin, various fiber reinforced layers, a metal foil layer, and the like. .
- acrylonitrile-butadiene rubber or its hydrogenated rubber blend rubber of acrylonitrile-butadiene rubber and polyvinyl chloride, fluorine rubber, epichlorohydrin rubber
- a rubber comprising at least one selected from the group consisting of EPDM and acrylic rubber is preferred, and acrylonitrile-butadiene rubber or hydrogenated rubber thereof, blend rubber of acrylonitrile-butadiene rubber and polyvinyl chloride, fluorine rubber, epichlorohydrin rubber More preferably, it is made of at least one rubber selected from the group consisting of:
- the thermoplastic resin is a heat composed of at least one selected from the group consisting of fluororesins, polyamide resins, polyolefin resins, polyester resins, polyvinyl alcohol resins, polyvinyl chloride resins, and polyphenylene sulfide resins.
- a plastic resin is preferable, and a thermoplastic resin made of at least one selected from the group consisting of a fluororesin, a polyamide resin, a polyvinyl alcohol resin, and a polyphenylene sulfide resin is more preferable.
- surface treatment may be performed as necessary.
- the type of the surface treatment is not particularly limited as long as it is a treatment method that enables adhesion.
- discharge treatment such as plasma discharge treatment or corona discharge treatment, wet metal sodium / naphthalene liquid treatment Etc.
- a primer treatment is also suitable as the surface treatment.
- Primer treatment can be performed according to a conventional method. When the primer treatment is applied, the surface of the fluororubber that has not been surface-treated can be treated, but if the primer treatment is further performed after plasma discharge treatment, corona discharge treatment, metal sodium / naphthalene liquid treatment, etc. are performed in advance. Is more effective.
- Diaphragm The fluororubber molded product of the present invention can be suitably used for the following diaphragms.
- automobile engines include diaphragms such as fuel systems, exhaust systems, brake systems, drive systems, and ignition systems that require heat resistance, oxidation resistance, fuel resistance, low gas permeability, and the like.
- Examples of the diaphragm used in the fuel system of the automobile engine include a fuel pump diaphragm, a carburetor diaphragm, a pressure regulator diaphragm, a pulsation damper diaphragm, an ORVR diaphragm, a canister diaphragm, an auto fuel cock diaphragm, and the like. .
- Examples of the diaphragm used in the exhaust system of the automobile engine include a waste gate diaphragm, an actuator diaphragm, an EGR diaphragm, and the like.
- Examples of the diaphragm used for the brake system of the automobile engine include an air brake diaphragm.
- Examples of the diaphragm used in the drive system of the automobile engine include an oil pressure diaphragm.
- Examples of the diaphragm used in the ignition system of the automobile engine include a distributor diaphragm.
- Dynamic viscoelasticity test (A) Dynamic viscoelasticity measurement at the time of non-crosslinking (shear elastic modulus G ′) Difference ⁇ G ′ (G ′ (1%) ⁇ G ′ (100%) between the shear modulus G ′ (1%) at a dynamic strain of 1% and the shear modulus G ′ (100%) at a dynamic strain of 100% )) Measuring method Using a rubber process analyzer (model: RPA2000) manufactured by Alpha Technologies, the dynamic viscoelasticity is measured at 100 ° C. and 1 Hz.
- Tensile breaking strength, tensile breaking elongation RTA-1T manufactured by Orientec Co., Ltd. and AG-I manufactured by Shimadzu Corporation are used as test machines.
- the tensile breaking strength and tensile breaking elongation are measured using a dumbbell of No. 6 with a tensile speed of 500 mm / min set to 50 mm between chucks. Measurement temperature shall be 25 degreeC and 160 degreeC.
- Mooney viscosity (ML 1 + 10 (100 ° C.)) Mooney viscosity is measured in accordance with ASTM-D1646 and JIS K6300. The measurement temperature is 100 ° C.
- the polymerization time was 7.5 hours.
- VdF / HFP 76/24 (mol%), and the Mooney viscosity (ML 1 + 10 (100 ° C.)) was 89.
- This fluororubber is designated as fluororubber A2.
- the polymerization time was 7.4 hours.
- VdF / HFP 84/16 (mol%), and the Mooney viscosity (ML 1 + 10 (100 ° C.)) was 93.
- This fluororubber is referred to as fluororubber A3.
- a polymerization initiator solution in which 30 mg of APS was dissolved in 5 ml of pure water was injected with nitrogen gas to initiate the reaction.
- an additional mixed monomer of VdF / PMVE 67/33 mol% was injected until the internal pressure became 1.52 MPa.
- 2.72 g of diiodine compound I (CF 2 ) 4 I was injected.
- an aqueous solution of 30 mg of APS / 5 ml of pure water was injected with nitrogen gas every 3 hours to continue the polymerization reaction.
- the polymerization time was 6.5 hours.
- VdF / PMVE 79/21 (mol%) and the Mooney viscosity (ML 1 + 10 (100 ° C.)) was 60.
- This fluororubber is designated as fluororubber A5.
- the polymerization time was 8.1 hours.
- VdF / PMVE 85/15 (mol%), and the Mooney viscosity (ML 1 + 10 (100 ° C.)) was 72.
- This fluororubber is referred to as fluororubber A6.
- Zinc oxide kind (manufactured by Sakai Chemical Industry Co., Ltd.)
- Example 1 Using a kneading machine (MixLabo 0.5L manufactured by Moriyama Co., Ltd., rotor diameter: 6.6 cm, tip clearance: 0.05 cm), the front rotor rotation speed: 60 rpm, the back rotor rotation speed: 50 rpm, and fluorine 20 parts by mass of carbon black, 0.5 part by mass of stearylamine, and 1.0 part by mass of zinc oxide were kneaded with 100 parts by mass of rubber (A1) to prepare each fluororubber pre-compound (B1). The maximum temperature of the discharged kneaded material was 165 ° C.
- the obtained fluororubber pre-compound (B1) was subjected to a dynamic viscoelasticity test (1)-(A) to obtain ⁇ G ′.
- the results are shown in Table 1.
- fluororubber pre-compound (B1) 12 inch parts of fluororubber pre-compound (B1), an 8-inch open roll (manufactured by Kansai Roll Co., Ltd.), front roll rotation speed 21 rpm, back roll rotation speed 19 rpm, roll gap 0.1 cm
- 1.0 part by mass of a cross-linking agent, 0.5 part by mass of a cross-linking accelerator (TAIC) and 0.5 part by mass of stearylamine are kneaded for 30 minutes to obtain a fluororubber full compound (C1).
- the maximum temperature of the discharged kneaded material was 70 ° C.
- Example 2 Except that the fluororubber (A1) was changed to the fluororubber (A2), a kneaded and cross-linked sheet was prepared under the same conditions as in Example 1, and various physical properties were measured. The results are shown in Table 1.
- Example 3 Except that the fluororubber (A1) was changed to the fluororubber (A3), a kneaded and crosslinked sheet was prepared under the same conditions as in Example 1, and various physical properties were measured. The results are shown in Table 1.
- Example 4 Except for changing the fluororubber (A1) to a fluororubber (A4), a kneaded and cross-linked sheet was prepared under the same conditions as in Example 1, and various physical properties were measured. The results are shown in Table 1.
- Example 5 Except for changing the fluororubber (A1) to a fluororubber (A5), a kneaded and crosslinked sheet was prepared under the same conditions as in Example 1, and various physical properties were measured. The results are shown in Table 1.
- Example 6 Except that the fluororubber (A1) was changed to the fluororubber (A6), a kneaded and cross-linked sheet was prepared under the same conditions as in Example 1, and various physical properties were measured. The results are shown in Table 1.
- Example 7 Except that the fluororubber (A1) was changed to a fluororubber (A7), a kneaded and cross-linked sheet was prepared under the same conditions as in Example 1, and various physical properties were measured. The results are shown in Table 1.
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Abstract
Description
本願は、本明細書において全体にわたって参照として組み込まれた2010年8月25日出願の米国仮特許出願第61/376,990号の35U.S.C.§119(e)に基づく利益を請求する。
フッ素ゴム(A)は、全単量体成分に由来する構造単位の総量100モル%に対し、フッ化ビニリデンに由来する構造単位を48~88モル%含み、かつテトラフルオロエチレンに由来する構造単位を0~10モル%含むフッ化ビニリデン系フッ素ゴムであり、
フッ素ゴム架橋物が、動的粘弾性試験(測定温度:160℃、引張歪み:1%、初期加重:157cN、周波数:10Hz)において、損失弾性率E”が、400kPa以上6000kPa以下である成形品に関する。
フッ素ゴム(A)は、全単量体成分に由来する構造単位の総量100モル%に対し、フッ化ビニリデンに由来する構造単位を48~88モル%含み、かつテトラフルオロエチレンに由来する構造単位を0~10モル%含むフッ化ビニリデン系フッ素ゴムであり、
ラバープロセスアナライザ(RPA)による動的粘弾性試験(測定周波数:1Hz、測定温度:100℃)において、未架橋時の動的歪み1%時の剪断弾性率G’(1%)および動的歪み100%時の剪断弾性率G’(100%)の差δG’(G’(1%)-G’(100%))が、120kPa以上3,000kPa以下であるフッ素ゴム組成物にも関する。
フッ素ゴム(A)は、全単量体成分に由来する構造単位の総量100モル%に対し、フッ化ビニリデンに由来する構造単位を48~88モル%含み、かつテトラフルオロエチレンに由来する構造単位を0~10モル%含むフッ化ビニリデン系フッ素ゴムであり、
フッ素ゴム架橋物が、動的粘弾性試験(測定温度:160℃、引張歪み:1%、初期加重:157cN、周波数:10Hz)において、損失弾性率E”が、400kPa以上6000kPa以下である。
本発明におけるフッ素ゴム(A)は、フッ素ゴム(A)を形成するために用いられる全単量体成分に由来する構造単位の総量100モル%に対し、フッ化ビニリデン(VdF)に由来する構造単位(VdF単位)を48~88モル%含むフッ化ビニリデン系フッ素ゴム(VdF系ゴム)であって、テトラフルオロエチレンに由来する構造単位(TFE単位)を含む場合は10モル%以下であるフッ化ビニリデン系フッ素ゴム(VdF系ゴム)である。VdF単位の含有量は70~85モル%が好ましく、75~85モル%がより好ましい。またTFE単位の含有量は0~3モル%が好ましい。なお、フッ素ゴム(A)は、VdF単位及びTFE単位以外のその他の構造単位を含んでいてもよい。VdF単位及びTFE単位以外のその他の構造単位の含有量は、フッ素ゴム(A)を形成するために用いられる全単量体成分に由来する構造単位の総量100モル%に対し、2~52モル%であることが好ましい。
CH2=CFRf (1)
(式中、Rfは炭素数1~12の直鎖または分岐したフルオロアルキル基)で表される含フッ素単量体(1)などのフッ素含有単量体;エチレン(Et)、プロピレン(Pr)、アルキルビニルエーテル等のフッ素非含有単量体、架橋性基(キュアサイト)を与える単量体、および反応性乳化剤などが挙げられ、これらの単量体や化合物のなかから1種または2種以上を組み合わせて用いることができる。
(式中、Rf 1は炭素数1~6の直鎖または分岐状パーフルオロアルキル基、炭素数5~6の環式パーフルオロアルキル基、1~3個の酸素原子を含む炭素数2~6の直鎖または分岐状パーフルオロオキシアルキル基である)で表されるパーフルオロビニルエーテルを用いてもよく、CF2=CFOCF2OCF3、CF2=CFOCF2OCF2CF3、または、CF2=CFOCF2OCF2CF2OCF3を用いることが好ましい。
VdF/HFP共重合体としては、VdF/HFPのモル%比が48/52~85/15であるものが好ましく、50/50~78/22であるものがより好ましく、55/45~77/23であるものが更に好ましい。
式(3):
CY1 2=CY2Rf 2X1 (3)
(式中、Y1、Y2は、同一又は異なって、フッ素原子、水素原子または-CH3;Rf 2は1個以上のエーテル結合性酸素原子を有していてもよく、芳香環を有していてもよい、水素原子の一部または全部がフッ素原子で置換された直鎖状または分岐状の含フッ素アルキレン基;X1はヨウ素原子または臭素原子)
で示される化合物が挙げられる。具体的には、たとえば、式(4):
CY1 2=CY2Rf 3CHR1-X1 (4)
(式中、Y1、Y2、X1は前記同様であり、Rf 3は1個以上のエーテル結合性酸素原子を有していてもよく水素原子の一部または全部がフッ素原子で置換された直鎖状または分岐状の含フッ素アルキレン基、すなわち水素原子の一部または全部がフッ素原子で置換された直鎖状または分岐状の含フッ素アルキレン基、水素原子の一部または全部がフッ素原子で置換された直鎖状または分岐状の含フッ素オキシアルキレン基、または水素原子の一部または全部がフッ素原子で置換された直鎖状または分岐状の含フッ素ポリオキシアルキレン基;R1は水素原子またはメチル基)
で示されるヨウ素含有モノマー、臭素含有モノマー、一般式(5)~(22):
CY4 2=CY4(CF2)n-X1 (5)
(式中、Y4は、同一又は異なって、水素原子またはフッ素原子、nは1~8の整数)
CF2=CFCF2Rf 4-X1 (6)
(式中、
CF2=CFCF2(OCF(CF3)CF2)m
(OCH2CF2CF2)nOCH2CF2-X1 (7)
(式中、mは0~5の整数、nは0~5の整数)
CF2=CFCF2(OCH2CF2CF2)m
(OCF(CF3)CF2)nOCF(CF3)-X1 (8)
(式中、mは0~5の整数、nは0~5の整数)
CF2=CF(OCF2CF(CF3))mO(CF2)n-X1 (9)
(式中、mは0~5の整数、nは1~8の整数)
CF2=CF(OCF2CF(CF3))m-X1 (10)
(式中、mは1~5の整数)
CF2=CFOCF2(CF(CF3)OCF2)nCF(-X1)CF3
(11)
(式中、nは1~4の整数)
CF2=CFO(CF2)nOCF(CF3)-X1 (12)
(式中、nは2~5の整数)
CF2=CFO(CF2)n-(C6H4)-X1 (13)
(式中、nは1~6の整数)
CF2=CF(OCF2CF(CF3))nOCF2CF(CF3)-X1
(14)
(式中、nは1~2の整数)
CH2=CFCF2O(CF(CF3)CF2O)nCF(CF3)-X1
(15)
(式中、nは0~5の整数)、
CF2=CFO(CF2CF(CF3)O)m(CF2)n-X1 (16)
(式中、mは0~5の整数、nは1~3の整数)
CH2=CFCF2OCF(CF3)OCF(CF3)-X1 (17)
CH2=CFCF2OCH2CF2-X1 (18)
CF2=CFO(CF2CF(CF3)O)mCF2CF(CF3)-X1
(19)
(式中、mは0以上の整数)
CF2=CFOCF(CF3)CF2O(CF2)n-X1 (20)
(式中、nは1以上の整数)
CF2=CFOCF2OCF2CF(CF3)OCF2-X1 (21)
CH2=CH-(CF2)nX1 (22)
(式中、nは2~8の整数)
(一般式(5)~(22)中、X1は前記と同様)
で表されるヨウ素含有モノマー、臭素含有モノマーなどが挙げられ、これらをそれぞれ単独で、または任意に組合わせて用いることができる。
で表されるヨウ素含有フッ素化ビニルエーテルが好ましく挙げられ、より具体的には、
(式中、R2、R3、R4、R5、R6およびR7は同じかまたは異なり、いずれもH、または炭素数1~5のアルキル基;Zは、直鎖もしくは分岐状の、酸素原子を含んでいてもよい、好ましくは少なくとも部分的にフッ素化された炭素数1~18のアルキレンもしくはシクロアルキレン基、または(パー)フルオロポリオキシアルキレン基)で示されるビスオレフィン化合物も架橋性基を与える単量体として好ましい。なお、本明細書において、「(パー)フルオロポリオキシアルキレン基」とは、「フルオロポリオキシアルキレン基又はパーフルオロポリオキシアルキレン基」を意味する。
-(Q)p-CF2O-(CF2CF2O)m-(CF2O)n-CF2-(Q)p-
(式中、Qは炭素数1~10のアルキレン基または炭素数2~10のオキシアルキレン基であり、pは0または1であり、m及びnはm/n比が0.2~5となり且つ該(パー)フルオロポリオキシアルキレン基の分子量が500~10000、好ましくは1000~4000の範囲となるような整数である。)で表される(パー)フルオロポリオキシアルキレン基であることが好ましい。この式において、Qは好ましくは、-CH2OCH2-及び-CH2O(CH2CH2O)sCH2-(s=1~3)の中から選ばれる。
CH2=CH-(CF2)4-CH=CH2、
CH2=CH-(CF2)6-CH=CH2、
式:CH2=CH-Z1-CH=CH2
(式中、Z1は-CH2OCH2-CF2O-(CF2CF2O)m-(CF2O)n-CF2-CH2OCH2-(m/nは0.5))
などが挙げられる。
本発明において、カーボンブラック(B)として、上記範囲の損失弾性率E”、更に好ましくは後述する範囲の貯蔵弾性率E’を与えるカーボンブラックであれば特に制限されない。
平均剪断速度(1/秒)=(π×D×R)/(60(秒)×c)
(式中、
D:ローター径またはロール径(cm)
R:回転速度(rpm)
c:チップクリアランス(cm。ローターとケーシングとの間隙の距離、またはロール同士の間隙の距離)
過酸化物架橋系により架橋する場合は、架橋点に炭素-炭素結合を有しているので、架橋点に炭素-酸素結合を有するポリオール架橋系および炭素-窒素二重結合を有するポリアミン架橋系に比べて、耐薬品性および耐スチーム性に優れているという特徴がある。
ポリオール架橋系により架橋する場合は、架橋点に炭素-酸素結合を有しており、圧縮永久歪みが小さく、成形性に優れているという特徴がある点で好適である。
ポリアミン架橋により架橋してなる場合は、架橋点に炭素-窒素二重結合を有しているものであり、動的機械特性に優れているという特徴がある。しかし、ポリオール架橋系または過酸化物架橋系架橋剤を用いて架橋する場合に比べて、圧縮永久歪みが大きくなる傾向がある。
ホースとしては、本発明のフッ素ゴム組成物を架橋して得られるフッ素ゴム架橋物のみからなる単層構造のホースであってもよいし、他の層との積層構造の多層ホースであってもよい。
シール材としては、以下に示す分野で好適に用いることができる。
本発明のフッ素ゴム成形品は、以下に示すベルトに好適に用いることができる。
本発明のフッ素ゴム成形品は、防振ゴムにおける単層および多層構造のゴム層として用いることにより、防振ゴムへの要求特性を高い水準で満たすものであり、優れた特性を有する自動車用防振ゴムを提供することができる。
本発明のフッ素ゴム成形品は、以下に示すダイヤフラムに好適に用いることができる。
自動車エンジンのブレーキ系に用いられるダイヤフラムとしては、例えばエアーブレーキ用ダイヤフラムなどが挙げられる。
自動車エンジンの駆動系に用いられるダイヤフラムとしては、例えばオイルプレッシャー用ダイヤフラムなどが挙げられる。
自動車エンジンの点火系に用いられるダイヤフラムとしては、例えばディストリビューター用ダイヤフラムなどが挙げられる。
(A)未架橋時動的粘弾性測定(剪断弾性率G’)
動的歪み1%時の剪断弾性率G’(1%)及び動的歪み100%時の剪断弾性率G’(100%)の差δG’(G’(1%)-G’(100%))の測定方法
アルファテクノロジーズ社製のラバープロセスアナライザ(型式:RPA2000)を用いて、100℃、1Hzで動的粘弾性を測定する。
(B)架橋物の動的粘弾性測定(貯蔵弾性率E’および損失弾性率E”)
測定装置:アイティー計測制御(株)製の動的粘弾性測定装置DVA-220
測定条件
試験片: 幅3mm×厚さ2mmサイズの長方体の架橋済みゴム
測定モード:引張
チャック間距離:20mm
測定温度:160℃
引張歪み:1%
初期加重:157cN
周波数:10Hz
試験機は、オリエンテック社製のRTA-1T、(株)島津製作所製のAG-Iを用いる。JIS-K6251に準じ、チャック間50mmに設定、引張速度500mm/min、6号ダンベルを用いて引張破断強度、引張破断伸びを測定する。測定温度は、25℃、160℃とする。
ムーニー粘度は、ASTM-D1646およびJIS K6300に準拠して測定する。測定温度は100℃である。
3Lのステンレススチール製のオートクレーブに純水1.7L、CH2=CFCF2OCF(CF3)CF2OCF(CF3)COONH4の50%水溶液を0.17g、F(CF2)5COONH4の50%水溶液6.8gを仕込み、系内を窒素ガスで充分に置換した。600rpmで攪拌しながら80℃に昇温した後、初期槽内モノマー組成をVdF/HFP=34/66モル%、1.52MPaとなるようにモノマーを圧入した。ついでAPS60mgを5mlの純水に溶解した重合開始剤溶液を窒素ガスで圧入し、反応を開始した。重合の進行に伴い内圧が1.42MPaに降下した時点でVdF/HFP=68/32モル%の追加混合モノマーを内圧が1.52MPaとなるまで圧入した。このとき、ジヨウ素化合物I(CF2)4Iの1.96gを圧入した。昇圧、降圧を繰り返しつつ、3時間ごとにAPSの60mg/純水5ml水溶液を窒素ガスで圧入して、重合反応を継続した。混合モノマーを600g追加した時点で、未反応モノマーを放出し、オートクレーブを冷却して、固形分濃度26.3質量%のフッ素ゴムのディスパージョンを617g得た。重合時間は7.9時間であった。このフッ素ゴムをNMR分析により共重合組成を調べたところ、VdF/HFP=68/32(モル%)であり、ムーニー粘度(ML1+10(100℃))は69であった。このフッ素ゴムをフッ素ゴムA1とする。
3Lのステンレススチール製のオートクレーブに純水1.7L、CH2=CFCF2OCF(CF3)CF2OCF(CF3)COONH4の50%水溶液を0.17g、F(CF2)5COONH4の50%水溶液6.8gを仕込み、系内を窒素ガスで充分に置換した。600rpmで攪拌しながら80℃に昇温した後、初期槽内モノマー組成をVdF/HFP=45/55モル%、1.52MPaとなるようにモノマーを圧入した。ついでAPS60mgを5mlの純水に溶解した重合開始剤溶液を窒素ガスで圧入し、反応を開始した。重合の進行に伴い内圧が1.42MPaに降下した時点でVdF/HFP=76/24モル%の追加混合モノマーを内圧が1.52MPaとなるまで圧入した。このとき、ジヨウ素化合物I(CF2)4Iの1.96gを圧入した。昇圧、降圧を繰り返しつつ、3時間ごとにAPSの60mg/純水5ml水溶液を窒素ガスで圧入して、重合反応を継続した。混合モノマーを600g追加した時点で、未反応モノマーを放出し、オートクレーブを冷却して、固形分濃度26.6質量%のフッ素ゴムのディスパージョンを628g得た。重合時間は7.5時間であった。このフッ素ゴムをNMR分析により共重合組成を調べたところ、VdF/HFP=76/24(モル%)であり、ムーニー粘度(ML1+10(100℃))は89であった。このフッ素ゴムをフッ素ゴムA2とする。
3Lのステンレススチール製のオートクレーブに純水1.7L、CH2=CFCF2OCF(CF3)CF2OCF(CF3)COONH4の50%水溶液を0.17g、F(CF2)5COONH4の50%水溶液6.8gを仕込み、系内を窒素ガスで充分に置換した。600rpmで攪拌しながら80℃に昇温した後、初期槽内モノマー組成をVdF/HFP=59/41モル%、1.52MPaとなるようにモノマーを圧入した。ついでAPS60mgを5mlの純水に溶解した重合開始剤溶液を窒素ガスで圧入し、反応を開始した。重合の進行に伴い内圧が1.42MPaに降下した時点でVdF/HFP=84/16モル%の追加混合モノマーを内圧が1.52MPaとなるまで圧入した。このとき、ジヨウ素化合物I(CF2)4Iの1.96gを圧入した。昇圧、降圧を繰り返しつつ、3時間ごとにAPSの60mg/純水5ml水溶液を窒素ガスで圧入して、重合反応を継続した。混合モノマーを600g追加した時点で、未反応モノマーを放出し、オートクレーブを冷却して、固形分濃度26.7質量%のフッ素ゴムのディスパージョンを628g得た。重合時間は7.4時間であった。このフッ素ゴムをNMR分析により共重合組成を調べたところ、VdF/HFP=84/16(モル%)であり、ムーニー粘度(ML1+10(100℃))は93であった。このフッ素ゴムをフッ素ゴムA3とする。
3Lのステンレススチール製のオートクレーブに純水1.7L、CH2=CFCF2OCF(CF3)CF2OCF(CF3)COONH4の50%水溶液を0.17g、F(CF2)5COONH4の50%水溶液6.8gを仕込み、系内を窒素ガスで充分に置換した。600rpmで攪拌しながら80℃に昇温した後、初期槽内モノマー組成をVdF/PMVE=68/32モル%、1.52MPaとなるようにモノマーを圧入した。ついでAPS30mgを5mlの純水に溶解した重合開始剤溶液を窒素ガスで圧入し、反応を開始した。重合の進行に伴い内圧が1.42MPaに降下した時点でVdF/PMVE=67/33モル%の追加混合モノマーを内圧が1.52MPaとなるまで圧入した。このとき、ジヨウ素化合物I(CF2)4Iの2.72gを圧入した。昇圧、降圧を繰り返しつつ、3時間ごとにAPSの30mg/純水5ml水溶液を窒素ガスで圧入して、重合反応を継続した。混合モノマーを600g追加した時点で、未反応モノマーを放出し、オートクレーブを冷却して、固形分濃度27.0質量%のフッ素ゴムのディスパージョンを610g得た。重合時間は6.4時間であった。このフッ素ゴムをNMR分析により共重合組成を調べたところ、VdF/PMVE=71/29(モル%)であり、ムーニー粘度(ML1+10(100℃))は45であった。このフッ素ゴムをフッ素ゴムA4とする。
3Lのステンレススチール製のオートクレーブに純水1.7L、CH2=CFCF2OCF(CF3)CF2OCF(CF3)COONH4の50%水溶液を0.17g、F(CF2)5COONH4の50%水溶液6.8gを仕込み、系内を窒素ガスで充分に置換した。600rpmで攪拌しながら80℃に昇温した後、初期槽内モノマー組成をVdF/PMVE=77/23モル%、1.52MPaとなるようにモノマーを圧入した。ついでAPS30mgを5mlの純水に溶解した重合開始剤溶液を窒素ガスで圧入し、反応を開始した。重合の進行に伴い内圧が1.42MPaに降下した時点でVdF/PMVE=76/24モル%の追加混合モノマーを内圧が1.52MPaとなるまで圧入した。このとき、ジヨウ素化合物I(CF2)4Iの2.72gを圧入した。昇圧、降圧を繰り返しつつ、3時間ごとにAPSの30mg/純水5ml水溶液を窒素ガスで圧入して、重合反応を継続した。混合モノマーを600g追加した時点で、未反応モノマーを放出し、オートクレーブを冷却して、固形分濃度26.3質量%のフッ素ゴムのディスパージョンを618g得た。重合時間は6.5時間であった。このフッ素ゴムをNMR分析により共重合組成を調べたところ、VdF/PMVE=79/21(モル%)であり、ムーニー粘度(ML1+10(100℃))は60であった。このフッ素ゴムをフッ素ゴムA5とする。
3Lのステンレススチール製のオートクレーブに純水1.7L、CH2=CFCF2OCF(CF3)CF2OCF(CF3)COONH4の50%水溶液を0.17g、F(CF2)5COONH4の50%水溶液6.8gを仕込み、系内を窒素ガスで充分に置換した。600rpmで攪拌しながら80℃に昇温した後、初期槽内モノマー組成をVdF/PMVE=84/16モル%、1.52MPaとなるようにモノマーを圧入した。ついでAPS30mgを5mlの純水に溶解した重合開始剤溶液を窒素ガスで圧入し、反応を開始した。重合の進行に伴い内圧が1.42MPaに降下した時点でVdF/PMVE=84/16モル%の追加混合モノマーを内圧が1.52MPaとなるまで圧入した。このとき、ジヨウ素化合物I(CF2)4Iの2.72gを圧入した。昇圧、降圧を繰り返しつつ、3時間ごとにAPSの30mg/純水5ml水溶液を窒素ガスで圧入して、重合反応を継続した。混合モノマーを600g追加した時点で、未反応モノマーを放出し、オートクレーブを冷却して、固形分濃度26.3質量%のフッ素ゴムのディスパージョンを614g得た。重合時間は8.1時間であった。このフッ素ゴムをNMR分析により共重合組成を調べたところ、VdF/PMVE=85/15(モル%)であり、ムーニー粘度(ML1+10(100℃))は72であった。このフッ素ゴムをフッ素ゴムA6とする。
3Lのステンレススチール製のオートクレーブに純水1.7L、CH2=CFCF2OCF(CF3)CF2OCF(CF3)COONH4の50%水溶液を0.17g、F(CF2)5COONH4の50%水溶液6.8gを仕込み、系内を窒素ガスで充分に置換した。600rpmで攪拌しながら80℃に昇温した後、初期槽内モノマー組成をVdF/HFP/TFE=59/35/6モル%、1.52MPaとなるようにモノマーを圧入した。ついでAPS60mgを5mlの純水に溶解した重合開始剤溶液を窒素ガスで圧入し、反応を開始した。重合の進行に伴い内圧が1.42MPaに降下した時点でVdF/HFP/TFE=72/21/7モル%の追加混合モノマーを内圧が1.52MPaとなるまで圧入した。このとき、ジヨウ素化合物I(CF2)4Iを1.95g圧入した。昇圧、降圧を繰り返しつつ、3時間ごとにAPSの60mg/純水5ml水溶液を窒素ガスで圧入して、重合反応を継続した。混合モノマーを600g追加した時点で、未反応モノマーを放出し、オートクレーブを冷却して、固形分濃度26.7質量%のフッ素ゴムのディスパージョンを623g得た。重合時間は6.2時間であった。このフッ素ゴムをNMR分析により共重合組成を調べたところ、VdF/HFP/TFE=72/21/7(モル%)であり、ムーニー粘度(ML1+10(100℃))は63であった。このフッ素ゴムをフッ素ゴムA7とする。
ISAF(N2SA=119m2/g、DBP吸油量=114ml/100g)。東海カーボン(株)製の「シースト6」(商品名)
2,5-ジメチル-2,5-ジ(t-ブチルパーオキシ)ヘキサン。日油(株)製の「パーヘキサ25B」(商品名)
トリアリルイソシアヌレート(TAIC)。日本化成(株)製の「タイク」(商品名)
ステアリルアミン(ファーミン86T)(花王(株)製)
酸化亜鉛(一種)(堺化学工業(株)製)
混練機((株)モリヤマ製のMixLabo0.5L、ローター直径:6.6cm、チップクリアランス:0.05cm)を用いて、フロントローター回転数:60rpm、バックローター回転数:50rpmの混練条件で、フッ素ゴム(A1)100質量部にカーボンブラック20質量部、ステアリルアミン0.5質量部、酸化亜鉛1.0質量部を混練し、各フッ素ゴムプレコンパウンド(B1)を調製した。なお、排出された混練物の最高温度は165℃であった。
フッ素ゴム(A1)をフッ素ゴム(A2)にした以外は、実施例1と同様な条件で混練、架橋シートを作製し、各種物性を測定した。結果を表1に示す。
フッ素ゴム(A1)をフッ素ゴム(A3)にした以外は、実施例1と同様な条件で混練、架橋シートを作製し、各種物性を測定した。結果を表1に示す。
フッ素ゴム(A1)をフッ素ゴム(A4)にした以外は、実施例1と同様な条件で混練、架橋シートを作製し、各種物性を測定した。結果を表1に示す。
フッ素ゴム(A1)をフッ素ゴム(A5)にした以外は、実施例1と同様な条件で混練、架橋シートを作製し、各種物性を測定した。結果を表1に示す。
フッ素ゴム(A1)をフッ素ゴム(A6)にした以外は、実施例1と同様な条件で混練、架橋シートを作製し、各種物性を測定した。結果を表1に示す。
フッ素ゴム(A1)をフッ素ゴム(A7)にした以外は、実施例1と同様な条件で混練、架橋シートを作製し、各種物性を測定した。結果を表1に示す。
Claims (9)
- フッ素ゴム(A)およびカーボンブラック(B)を含むフッ素ゴム組成物を架橋して得られるフッ素ゴム架橋物を有し、
フッ素ゴム(A)は、全単量体成分に由来する構造単位の総量100モル%に対し、フッ化ビニリデンに由来する構造単位を48~88モル%含み、かつテトラフルオロエチレンに由来する構造単位を0~10モル%含むフッ化ビニリデン系フッ素ゴムであり、
フッ素ゴム架橋物が、動的粘弾性試験(測定温度:160℃、引張歪み:1%、初期加重:157cN、周波数:10Hz)において、損失弾性率E”が、400kPa以上6000kPa以下である成形品。 - フッ素ゴム架橋物が、動的粘弾性試験(測定温度:160℃、引張歪み:1%、初期加重:157cN、周波数:10Hz)において、貯蔵弾性率E’が1500kPa以上20000kPa以下である請求項1記載の成形品。
- フッ素ゴム組成物は、フッ素ゴム(A)100質量部に対してカーボンブラック(B)を5~65質量部含む請求項1または2記載の成形品。
- カーボンブラック(B)が、窒素吸着比表面積(N2SA)が5~180m2/gであって、ジブチルフタレート(DBP)吸油量が40~180ml/100gであるカーボンブラックである請求項1~3のいずれか1項に記載の成形品。
- 前記フッ素ゴム組成物が、架橋剤(C)を含む請求項1~4のいずれか1項に記載の成形品。
- フッ素ゴム(A)およびカーボンブラック(B)を含み、
フッ素ゴム(A)は、全単量体成分に由来する構造単位の総量100モル%に対し、フッ化ビニリデンに由来する構造単位を48~88モル%含み、かつテトラフルオロエチレンに由来する構造単位を0~10モル%含むフッ化ビニリデン系フッ素ゴムであり、
ラバープロセスアナライザ(RPA)による動的粘弾性試験(測定周波数:1Hz、測定温度:100℃)において、未架橋時の動的歪み1%時の剪断弾性率G’(1%)および動的歪み100%時の剪断弾性率G’(100%)の差δG’(G’(1%)-G’(100%))が、120kPa以上3,000kPa以下であるフッ素ゴム組成物。 - フッ素ゴム(A)100質量部に対してカーボンブラック(B)を5~65質量部含む請求項6記載のフッ素ゴム組成物。
- カーボンブラック(B)が、窒素吸着比表面積(N2SA)が5~180m2/gであって、ジブチルフタレート(DBP)吸油量が40~180ml/100gであるカーボンブラックである請求項6または7記載のフッ素ゴム組成物。
- 前記フッ素ゴム組成物が、架橋剤(C)を含む請求項6~8のいずれか1項に記載のフッ素ゴム組成物。
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WO2012026557A1 (ja) | 2010-08-25 | 2012-03-01 | ダイキン工業株式会社 | シール材 |
JP5720689B2 (ja) | 2010-08-25 | 2015-05-20 | ダイキン工業株式会社 | フッ素ゴム組成物 |
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US9499678B2 (en) | 2012-02-24 | 2016-11-22 | Daikin Industries, Ltd. | Fluororubber composition |
WO2013125735A1 (en) * | 2012-02-24 | 2013-08-29 | Daikin Industries, Ltd. | Fluororubber composition |
US9976016B2 (en) | 2012-02-24 | 2018-05-22 | Daikin Industries, Ltd. | Fluororubber composition |
US11898661B2 (en) | 2012-02-24 | 2024-02-13 | Daikin Industries, Ltd. | Fluororubber composition |
JPWO2020080523A1 (ja) * | 2018-10-18 | 2021-09-02 | ダイキン工業株式会社 | 含フッ素エラストマー、架橋性組成物および成形品 |
CN115449008A (zh) * | 2018-10-18 | 2022-12-09 | 大金工业株式会社 | 含氟弹性体、交联性组合物和成型品 |
JP7235989B2 (ja) | 2018-10-18 | 2023-03-09 | ダイキン工業株式会社 | 含フッ素エラストマー、架橋性組成物および成形品 |
CN115449008B (zh) * | 2018-10-18 | 2023-10-24 | 大金工业株式会社 | 含氟弹性体、交联性组合物和成型品 |
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EP2568009A4 (en) | 2014-03-12 |
JPWO2012026559A1 (ja) | 2013-10-28 |
ES2620370T3 (es) | 2017-06-28 |
JP6120572B2 (ja) | 2017-04-26 |
US20120077939A1 (en) | 2012-03-29 |
EP2568009A1 (en) | 2013-03-13 |
CN103080220A (zh) | 2013-05-01 |
EP2568009B1 (en) | 2016-12-21 |
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